<div
  class="prev"
  *ngIf="showCollapseButton"
  dTooltip
  [content]="preTip"
  [ngClass]="prevClass"
  (click)="collapsePrePane()"
  (touchstart)="collapsePrePane()"
></div>
<div class="devui-resize-handle"></div>
<div
  class="next"
  *ngIf="showCollapseButton"
  dTooltip
  [content]="nextTip"
  [ngClass]="nextClass"
  (click)="collapseNextPane()"
  (touchstart)="collapseNextPane()"
></div>
